you were not connected because a duplicate name exists on the network 2003

To resolve this problem in Windows Server 2003, follow these steps:

1. Create the CNAME record for the file server on the appropriate DNS server, if the CNAME record is not already present.
2. Apply the following registry change to the file server. To do so, follow these steps:
   1. Start Registry Editor (Regedt32.exe).
   2. Locate and click the following key in the registry:
      HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\LanmanServer\Parameters
   3. On the Edit menu, click Add Value, and then add the following registry value:
      Value name: DisableStrictNameChecking
      Data type: REG_DWORD
      Radix: Decimal
      Value: 1
   4. Quit Registry Editor.
3. Restart your computer.